December 18, 2014 8:10pm ESTDecember 18, 2014 8:10pm ESTOne day after sitting out Chargers practice in order to recover from injuries to his chest and back, he was back on the field Thursday.Philip Rivers(Getty Images)

Rivers said sitting out Wednesday's practice in preparation for Saturday's game with the 49ers "was the only choice to make. … The week went as planned, to this point."

The news isn't so good for running back Ryan Matthews. He missed another day of practice with an ankle injury and is unlikely to play Saturday night. He hasn't played since getting the injury in a 23-14 loss to the Patriots on Dec. 7.